/*
 * Copyright (C) 2011-2021 Intel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

'use strict';

const fs = require('fs');
const path = require('path');
const logger = require('../common/logger').genericLogger;

module.exports = (caCertDirectories) => {
    let CACertsFiles = [];

    if (caCertDirectories) {
        CACertsFiles = caCertDirectories
            .map(dir =>
                fs.readdirSync(dir)
                    .map(caFile => path.join(dir, caFile))
                    .filter(path => fs.statSync(path).isDirectory())
                    .map(subdir =>
                        fs.readdirSync(subdir)
                            .map(caFile => path.join(subdir, caFile))
                            .filter(path => fs.statSync(path).isFile())
                    )
                    .reduce((all, inDir) => all.concat(inDir), [])
                    .concat(fs.readdirSync(dir)
                        .map(caFile => path.join(dir, caFile))
                        .filter(path => fs.statSync(path).isFile()))
            )
            .reduce((all, inDir) => all.concat(inDir), CACertsFiles);
    }
    logger.info('Read ' + CACertsFiles.length + ' certificates from ' + caCertDirectories);
    return CACertsFiles;
};
